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DIN 1629 Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels, it’s main grades are St 37.0, St44.0, St52.0, Din 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.
Chemical composition:
| Steel Grade | Type of deoxidization (R, killed (including semi-killed)) (RR,fully killed) |
Chemical Composition, % by mass | |||||
|---|---|---|---|---|---|---|---|
| Symbol | Material Number | C | P | S | N¹) | Addition of nitrogen fixing elements (e.g.not less than 0,020% Al total |
|
| St37.0 | 1.0254 | R | 0.17 | 0.040 | 0.040 | 0.009²) | – |
| St44.0 | 1.0255 | R | 0.21 | 0.040 | 0.040 | 0.009²) | – |
| St52.0³) | 1.0421 | RR | 0.22 | 0.040 | 0.035 | – | Yes |
Mechanical Tubing: ASTM A519:ASTM A519 American Society for Testing Material
Tube for Structures:DIN 1629 :Deutsches Institut fǖr Normung
Size: OD: 10.3mm-711.2mm WT: Hot finish: 0.250″-4.00″ Cold drawn: 0.035″-0.875″ Length: Random Length,Fixed Length, SRL,DRL
Heart treatment: Annealed, Normalized,Stress relieved ,Cold
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.
Grade:
Mechanical Tubing:1010,1020,1045,1518,4118,4130,4135,4140
Tube for Structures:St37.0, St44.0, St55, St52.0
